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when a hand crancked meggar is used to check most three phase induction motors, how many tests r rquired? Why?
1 4085when qty of cable being purchased is not sufficient according to the standard,what should the inspector do to ensure its quality according to the standard?
2078The D.C. spark test is applicable to single conductor cable & assemblies of insulated single conductor cables without insulation shield,metallic sheath or metalic armor?
1852Metal covered multiconductor cables shall employ a marker tape located within the cable running for its complete length in lieu of cable surface marking. Is it true or false?
2267How to find Cable size? Caterpillar generator produce (Two generators) 127*2=254 amp at 11 kv . What would be the cable size (XLPE) to supply 256 amp at 11 kv? Air or surrounding Temperature is 32 degree C. Cable will go under ground at 2.5 feet depth. Group Rating Factors is 3 cables. Clearance between cables is 7 cm. Soil Temperature (Ambient) 28o C Soil Thermal Resistivity is 1.2 K.m/W I would like to use 3 separate single core instead of using 3 core cable. Some says I should use three separate single core 120RM cables. Some says 70RM .some says 95. I m totally confused. Is there ant specific rule to determine cable size? What would be the LT cable size to flow 500 Amp current? Ifte My e mail address is ifte13@yahoo.com Anyone please send me the answer to my e mail address, i will be very glad.
1 84291. What does mean of "PS" stand for Diff. CT class? 2. What is the formula of KW for 1Phase load inturms of voltag,current & P.F.?
4 13175How can we calculate the current if we have load in KVA and if the load in KW then what formula will be use for calculating the current. please give both the formula for calculating the current.
3 9287How to convert KV into MV in a Transformer?. dont say multification of 1000.pls give practical convertion factor.
2 6039Post New Electrical Engineering Questions
why occ characteristics curve in not tracing back when we are bringing back the rhoestat?
Can we test the alignment of End shield and stator of turbogenerator without rotor insertion? Also how to fix maintain the alignment at site installation?
What is the formula to calculate the rating of a three phase air circuit breaker
why do you add the load short circuit impedance when considering short circuit amperage. It seems that you should only consider supply. If you need to consider loads and you don't know what loads are to be added , what would be a good sub-transient reactance rating for the loads?
Purpose of providing neutral isolation panel for parallel operation of diesel generator
what are the specifications we must look at to select a relay for any capacity motor?
acb(AIR CIRCUIT BREAKER)NOT CHARGING AUTO
what is a bus riser in power system and why it is used
Has someone here done a sizing for a generator (3 phase), its for a pumping station. If you have an example for standby/duty and both running (I) star delta (ii) Soft Starter.
TO CALCULATE THE RESISTANCE OF GRR OF HT MOTOR 400KW WHEREAS STATOR VOLTAGE 6.6KV AND ROTOR VOLTAGE 705V AND ROTOR CURRENT IS 346A.
our factory is going under construction mean time transformer 1000 kva 2 nos &load break swithch 12 kv & 4 nos 750 kva 2 nos & 380 kva 2 nos generator to be errcted.how to arrange earth pits &how to earth connect & neutral pit how to calculate in earth bit size.
i need list of swg(standard wire guage) or area of conductor v/s current carrying capacity of conductor copper & alluminium...
Y phase plates are used in transmission line??? what is there need???
Why is the frequency not changed during transformation of electrical energy in a transformer?
What happened ,If 3 phase clearance not maintained in 33KV Line,11KV LIne etc?
